Improvement in steam-cocks



. UNITED STATES PATENT OFFICE.

JAMES B. SARGENT AND FRANS. WV. TOVNE, OF FITUHBURG, MASS.

nvi PRovEMENT IN STEAM-SOCKS.

Specification forming part of Letters Fatcnt No. 48,452, dated June 27,1865.

To all whom 'it may concern:

Be it known that we, JAMES B. SARGENT and FRANCIS W. TOWNE, of Fitchburg, in the county of Worcester and State of Massachusetts, have invented an Improved Steam-Cock; and we do hereby declare the saine to be fully described in the following specification and represented in the accompanying drawings, of which-- Figure l is an elevation, and Fig. 2 a vertical and longitudinal section, ofit.

Much difficulty has been experienced in preventing the leakage around the valve-stem of a common steam-cock, especially when the stem,in order to move the valve, has a longi, tudinal as well as a rotary motion imparted to it.

In carrying out our invention we employ to operate the valve-stem a key, which, when in action, has a rotary motion only, and we provide such key with a flangef or collar and two' annuli of wood to surround the shank of the key and be placed in a box or case adapted to Vreceive them. We also combine with the valve, its stem, and its case an auxiliary guide and guide-socket, the whole being as lhereinafter described. The collar and wooden annuli,besides serving to maintain the shank in place, operate to prevent the escape of steam around the shank. The auxiliary guide and socket co-operate with the valve-stem and its female screw in imparting to the valve a true rectilinear movement and in properly directing it upon its seat.

In the drawings, A denotes the ease of the cock, it being furnished with a valve-seat partition, c, extending across it in manner as shown in Fig. 2. This partition has a conical valve-seat, c, made within it'to receive a corresponding valve, b, whose stem t has a male screw cut on its outer surface and adapted to a female screw, m, formed in a cap, B, which screws into the case, as shown at o o. The stem t' also has a socket,7t', made in it axially, and polygonal or square in crosssection, and adapted to receive the corresponding head Z of a key, C.

A hand-wheel, D, is applied to the upper end of the shank t ot' the key C. Furthermore,

the said shank has a collar or flange, q, encircling it and fixed to and projecting from it.

drieal chamber, a, formed in the upper part of the cap B, and furnished with'a cap-screw, E, which is screwed on the head of the part B. There are also placed within the said chamber two annuli or rings, r s, which encompass the shank t. One of these rings is above and the other below the flange q, and they are so made that when the cap E is screwed down it shall bear upon the upper ring, s, and force it down on the flange and the latter on the lower rin g, which is to'rest on the bottom of the chamber. These packing-rin gs we prefer to make of wood, because by means ofthe cap E, screwed on the screw g, the rings so made can be compressed sufciently to produce a steam-tight joint around the stem t, and besides this they serve to hold the key in its proper position and resist wear'for a great length of time.

The cap B has a chamber, n, formed in it to receive the valve-stem during the raising of the valve oii its seat.

raised on the bottom of the valve-case A, the said case being provided with coupling-screws On turning the key C thevvalvestem i will be put in revolution, seas to cause the screw thereof to elevate the valve from its seat. A contrary movement of the key will cause the valve to be `moved toward and closed on its sea-t.

Wewould remark that we are aware that it is not new in faucets to have the valve slide be lifted by a screw having a rotary but no longitudinal motion. Therefore we do not claim such, for with our improvement the valve can turn and iit itself to its seat,as either may become worn from time to time, and this is an important advantage. Therefore What we claimas our invention is 1. An improved steamcock made as described-viz., not only with the lifting-screws arranged with or applied to the ste-m of .the

This collar or ange is arranged in a cylin- From the bottom of the valve a cylindrical, guide, g, projects and extends into a correspending socket formed in a projection, h,

a l, and the whole being as shown in Fig. 2.

vertically without any rotary motion, and tov 

